Anatomy and Physiology

Binding of ____ to myosin permits cross-bridge ____ between actin and myosin.

Binding of ____ to myosin permits cross-bridge ____ between actin and myosin.

Binding of ____ to myosin permits cross-bridge ____ between actin and myosin.
 
  a. ATP, binding.
  b. ATP, detachment.
  c. calcium, binding.
  d. calcium, detachment.
  e. none of these answers.


(Qu

aac387   105   3 Replies

bubsjhoff128

Which is not characteristic of cross bridges?

Which is not characteristic of cross bridges?

Which is not characteristic of cross bridges?
 
  a. they are a component of thin filaments.
  b. they are comprised of myosin.
  c. they have an actin binding site.
  d. they have an ATPase binding site.
  e. they prov

buttsuni   43   2 Replies

buttsuni

The energy for cross bridge cycling during muscle contraction is provided by

The energy for cross bridge cycling during muscle contraction is provided by

The energy for cross bridge cycling during muscle contraction is provided by
 
  a. acetylcholine.
  b. Ca2+.
  c. ATP.
  d. myosin.
  e. actin.


(Question 2) Proteins are primarily digested to and

mireiajordan   54   3 Replies

medes1

Which of the following is involved in the process of muscle relaxation

Which of the following is involved in the process of muscle relaxation

Which of the following is involved in the process of muscle relaxation
 
  a. acetylcholinesterase destroys acetylcholine to allow the muscle membrane to return to resting potential.
  b. Ca2+ is released by the sarcoplasmic reticulum

Tamera   45   3 Replies

Erobles

A motor unit refers to

A motor unit refers to

A motor unit refers to
 
  a. a single motor neuron plus all of the muscle fibers it innervates.
  b. a single muscle fiber plus all of the motor neurons that innervate it.
  c. all of the motor neurons supplying a single muscle.

jnote01   71   2 Replies

jnote01

If you wanted to pick up something heavier than your pencil (such as your book), you would need to ...

If you wanted to pick up something heavier than your pencil (such as your book), you would need to ...

If you wanted to pick up something heavier than your pencil (such as your book), you would need to have a stronger muscle contraction. In what way might you accomplish this?
 
  a. stimulate more motor units
  b. decrease the frequenc

guccigangcuggu   57   2 Replies

guccigangcuggu

Muscle tension (Multiple Choice)

Muscle tension (Multiple Choice)

Muscle tension
 
  a. is created during muscle contraction as the tension generated by the contractile elements is transmitted via the connective tissue and tendons to the bones.
  b. is the force exerted on a muscle by the weight of

AnitaSmith   79   2 Replies

AnitaSmith

With eccentric muscle contractions, (Multiple Choice)

With eccentric muscle contractions, (Multiple Choice)

With eccentric muscle contractions,
 
  a. the development of tension occurs at constant muscle length.
  b. the muscle lengthens while contracting.
  c. the muscle shortens while contracting.
  d. muscle length and tension

Tamera   75   2 Replies

Tamera

Energy sources available to form ATP in muscle fibers are below. Which statement is correct? 1 . ...

Energy sources available to form ATP in muscle fibers are below. Which statement is correct? 1 . ...

Energy sources available to form ATP in muscle fibers are below. Which statement is correct?
 
  1 . phosphorylation of ADP by creatine phosphate
  2 . oxidative phosphorylation of ADP in the mitochondria
  3 . phosphorylation of

albulena   49   3 Replies

ilhjsh

Which of the following statements concerning the characteristics of different types of muscle fibers ...

Which of the following statements concerning the characteristics of different types of muscle fibers ...

Which of the following statements concerning the characteristics of different types of muscle fibers is incorrect?
 
  a. the higher the ATPase activity, the faster the speed of contraction.
  b. muscles that have high glycolytic capa

LMD   47   2 Replies

LMD

Fatigue is the failure of a muscle fiber to maintain ____ as a result of previous contractile ...

Fatigue is the failure of a muscle fiber to maintain ____ as a result of previous contractile ...

Fatigue is the failure of a muscle fiber to maintain ____ as a result of previous contractile activity.
 
  a. excitability.
  b. muscle mass.
  c. tension.
  d. sarcomere number.
  e. mitochondria.


(Q

LU DEE   61   2 Replies

LU DEE

The corticospinal system primarily mediates

The corticospinal system primarily mediates

The corticospinal system primarily mediates
 
  a. performances of fine, discrete, voluntary movements of the hands and fingers.
  b. postural movements
  c. movements of large leg and back muscles
  d. smooth muscles
 

Bowhunter522   32   2 Replies

Bowhunter522

Conscious initiation of muscle contraction is controlled by

Conscious initiation of muscle contraction is controlled by

Conscious initiation of muscle contraction is controlled by
 
  a. the spinal cord.
  b. the brain stem.
  c. the cerebral cortex.
  d. the thalamus.
  e. none of these answers.


(Question 2) The va

tutubella   56   1 Reply

NELS

The stretch receptors in the central portion of the muscle spindle can be activated by

The stretch receptors in the central portion of the muscle spindle can be activated by

The stretch receptors in the central portion of the muscle spindle can be activated by
 
  a. passive stretch of the whole muscle, including stretch of the muscle spindle.
  b. contraction of the end portions of the muscle spindle.

Maiem   53   2 Replies

Maiem

Which is characteristic of cardiac muscle tissue?

Which is characteristic of cardiac muscle tissue?

Which is characteristic of cardiac muscle tissue?
 
  a. well developed sarcoplasmic reticulum.
  b. fast myosin ATPase activity.
  c. contraction is initiated neurogenically.
  d. presence of gap junctions.
  e. calciu

bradenodom_3   48   1 Reply

bbk12

Which of the following muscle types are myogenic?

Which of the following muscle types are myogenic?

Which of the following muscle types are myogenic?
 
  a. cardiac muscle
  b. single-unit smooth muscle
  c. skeletal muscle
  d. both (a) and (b) above.
  e. all of these answers.


(Question 2) Whic

bradenodom_3   68   3 Replies

Erobles

What is responsible for initiating contraction of smooth muscle?

What is responsible for initiating contraction of smooth muscle?

What is responsible for initiating contraction of smooth muscle?
 
  a. stimulation by motor neurons
  b. inhibition of acetylcholinesterase
  c. membrane potential drifting to threshold as a result of automatic changes in ion mo

krazyrwe   90   2 Replies

krazyrwe

Muscle cells are the only cell types that contain intracellular contractile proteins. (True or false?)

Muscle cells are the only cell types that contain intracellular contractile proteins. (True or false?)

Muscle cells are the only cell types that contain intracellular contractile proteins.
 
  Indicate whether the statement is true or false


(Question 2) Bile consists of all of the following except:
 
  a. li

madisenjames   51   2 Replies

madisenjames

Thin and thick filaments overlap in the A band. (True or false?)

Thin and thick filaments overlap in the A band. (True or false?)

Thin and thick filaments overlap in the A band.
 
  Indicate whether the statement is true or false


(Question 2) Which does not enter the duodenal lumen?
 
  a. trypsinogen.
  b. bile salts.
  c.

miguelb80   48   3 Replies

ldages

The functional unit of skeletal muscle is the myofibril. (True or false?)

The functional unit of skeletal muscle is the myofibril. (True or false?)

The functional unit of skeletal muscle is the myofibril.
 
  Indicate whether the statement is true or false


(Question 2) Where is digestion completed?
 
  a. stomach.
  b. small intestine lumen.

Sonikapardal   56   2 Replies

Sonikapardal

Acetylcholinesterase has ATPase activity. (True or false?)

Acetylcholinesterase has ATPase activity. (True or false?)

Acetylcholinesterase has ATPase activity.
 
  Indicate whether the statement is true or false


(Question 2) Which of the following is absorbed receptor mediated endocytosis in the terminal ileum?
 
  a. fatt

beefybabies   43   1 Reply

peytonjl

In order for relaxation to occur, ACh must be removed from the muscle cell's receptors. (True or false?)

In order for relaxation to occur, ACh must be removed from the muscle cell's receptors. (True or false?)

In order for relaxation to occur, ACh must be removed from the muscle cell's receptors.
 
  Indicate whether the statement is true or false


(Question 2) These structures enter lacteals during absorption:
 

mireiajordan   39   1 Reply

sandhya@123

Rigor mortis occurs when Ca2+ links actin and the myosin globular head together in a rigor complex. ...

Rigor mortis occurs when Ca2+ links actin and the myosin globular head together in a rigor complex. ...

Rigor mortis occurs when Ca2+ links actin and the myosin globular head together in a rigor complex.
 
  Indicate whether the statement is true or false


(Question 2) Lipids
 
  a. are broken down by pepsin.

ferry_L   71   3 Replies

xojohndoe69

Summation events result from increasing amounts of cytoplasmic calcium levels. (True or false?)

Summation events result from increasing amounts of cytoplasmic calcium levels. (True or false?)

Summation events result from increasing amounts of cytoplasmic calcium levels.
 
  Indicate whether the statement is true or false


(Question 2) The defecation reflex
 
  a. is initiated when mass movements

seterria   34   2 Replies

seterria

With twitch summation, the muscle fiber is stimulated so rapidly that it does not have an ...

With twitch summation, the muscle fiber is stimulated so rapidly that it does not have an ...

With twitch summation, the muscle fiber is stimulated so rapidly that it does not have an opportunity to return to resting potential between stimuli.
 
  Indicate whether the statement is true or false


(Question 2) Th

glowupp   62   1 Reply

pavba

The metabolic capability of a muscle fiber can affect the degree of tension it can develop. ...

The metabolic capability of a muscle fiber can affect the degree of tension it can develop. ...

The metabolic capability of a muscle fiber can affect the degree of tension it can develop.
 
  Indicate whether the statement is true or false


(Question 2) The major metabolic waste product eliminated in the feces is

madisenjames   43   1 Reply

Hansolo18

Joints serve as fulcrums for muscle action. (True or false?)

Joints serve as fulcrums for muscle action. (True or false?)

Joints serve as fulcrums for muscle action.
 
  Indicate whether the statement is true or false


(Question 2) The function of mixing movements is to promote digestion and facilitate absorption.
 
  Indicate

jlam10   34   3 Replies

cryptokid

Oxidative phosphorylation occurs within the mitochondria of muscle cells. (True or false?)

Oxidative phosphorylation occurs within the mitochondria of muscle cells. (True or false?)

Oxidative phosphorylation occurs within the mitochondria of muscle cells.
 
  Indicate whether the statement is true or false


(Question 2) The only function of chewing is to break food up into smaller pieces and softe

smcc617   71   3 Replies

Aopok

Fast-oxidative muscle fibers have a high concentration of mitochondria. (True or false?)

Fast-oxidative muscle fibers have a high concentration of mitochondria. (True or false?)

Fast-oxidative muscle fibers have a high concentration of mitochondria.
 
  Indicate whether the statement is true or false


(Question 2) There is continuous salivary secretion due to constant low-level stimulation by

juicymae92   61   2 Replies

juicymae92

Skeletal muscles are capable of limited repair after injury. (True or false?)

Skeletal muscles are capable of limited repair after injury. (True or false?)

Skeletal muscles are capable of limited repair after injury.
 
  Indicate whether the statement is true or false


(Question 2) The swallowing center does not initiate and coordinate secondary peristaltic waves.
 

seterria   44   2 Replies

seterria

Single-unit smooth muscle and cardiac muscle are both self-excitable. (True or false?)

Single-unit smooth muscle and cardiac muscle are both self-excitable. (True or false?)

Single-unit smooth muscle and cardiac muscle are both self-excitable.
 
  Indicate whether the statement is true or false


(Question 2) Gastric secretion does not begin until the arrival of food in the stomach.
 

Kwilliams85   55   3 Replies

afkjnjsnfdk

The heart initiates its own action potentials without any external influence. (True or false?)

The heart initiates its own action potentials without any external influence. (True or false?)

The heart initiates its own action potentials without any external influence.
 
  Indicate whether the statement is true or false


(Question 2) The rate of gastric emptying is influenced by factors both in the stomach

smcc617   39   2 Replies

smcc617

Skeletal muscles are stimulated to contract by release of the neurotransmitter ____________________. ...

Skeletal muscles are stimulated to contract by release of the neurotransmitter ____________________. ...

Skeletal muscles are stimulated to contract by release of the neurotransmitter ____________________.
 
  Fill in the blank(s) with correct word


(Question 2) Enterogastrones are produced by the stomach.
 
 

aac387   28   2 Replies

aac387

The functional unit of skeletal muscle is a(n) ____________________. (Fill in the blank)

The functional unit of skeletal muscle is a(n) ____________________. (Fill in the blank)

The functional unit of skeletal muscle is a(n) ____________________.
 
  Fill in the blank(s) with correct word


(Question 2) The liver only secretes bile between meals.
 
  Indicate whether the statement is

Leahlaibe   48   1 Reply

bubsjhoff128

In a state of ____________________ a muscle cannot maintain any kind of tension. (Fill in the blank)

In a state of ____________________ a muscle cannot maintain any kind of tension. (Fill in the blank)

In a state of ____________________ a muscle cannot maintain any kind of tension.
 
  Fill in the blank(s) with correct word


(Question 2) In general, the parasympathetic nervous system is ____________________ to the di

2goodgabe   50   3 Replies

wert123

A(n) ____________________ develops following sustained anaerobic activity of muscles. (Fill in the blank)

A(n) ____________________ develops following sustained anaerobic activity of muscles. (Fill in the blank)

A(n) ____________________ develops following sustained anaerobic activity of muscles.
 
  Fill in the blank(s) with correct word


(Question 2) The simple, or _____________ salivary reflex occurs when chemoreceptors and

rylie4.4   41   2 Replies

rylie4.4

The immediate source of additional ATP in muscle fibers is ____________________. (Fill in the blank)

The immediate source of additional ATP in muscle fibers is ____________________. (Fill in the blank)

The immediate source of additional ATP in muscle fibers is ____________________.
 
  Fill in the blank(s) with correct word


(Question 2) The interstitial cells of __________ are the pacesetter cells responsible for in

Juicy93   45   1 Reply

brandelyn

Fast fibers have higher myosin _______ activity than slow fibers. (Fill in the blank)

Fast fibers have higher myosin _______ activity than slow fibers. (Fill in the blank)

Fast fibers have higher myosin _______ activity than slow fibers.
 
  Fill in the blank(s) with correct word


(Question 2) The pancreatic ____________________ secretion neutralizes acidic gastric contents in the duoden

AlfredDieselGuy   43   2 Replies

AlfredDieselGuy

The source of calcium in smooth muscle is the ____________________. (Fill in the blank)

The source of calcium in smooth muscle is the ____________________. (Fill in the blank)

The source of calcium in smooth muscle is the ____________________.
 
  Fill in the blank(s) with correct word


(Question 2) Chylomicrons are large, coated droplets of ____________________.
 
  Fill in the b

Leahlaibe   32   2 Replies

Leahlaibe

Describe the function of the muscle spindle and golgi tendon organ. What will be an ideal ...

Describe the function of the muscle spindle and golgi tendon organ. What will be an ideal ...

Describe the function of the muscle spindle and golgi tendon organ.
 
  What will be an ideal response?


(Question 2) The ____________________ is the longest segment of the small intestine.
 
  Fill in the b

miguelb80   56   1 Reply

pavba