Is there anyone that can help me out with these questions? Would be greatly appreciated.
Reproduction refers to:
A. the formation of new cells.
B. the production of a new individual.
C. Both the formation of new cells and the production of a new individual.
D. an increase in the size of cells.
E. Both an increase in the size of cells and the formation of new cells.
A compound is a chemical composed of two or more different elements.
True
False
Decomposition reactions break down chemical bonds.
True
False
Water requires a large amount of heat to change from a liquid to a gas.
True
False
Body fluids lost by excessive sweating during physical activity are most easily replaced by drinking pure water.
True
False
Calcium is involved in blood clotting.
True
False
Dehydration decreases the production of saliva.
True
False
Both body water and sodium are lost during excessive sweating.
True
False
Ribosomes consist of three subunits of equal size.
True
False
The plasma membrane consists of
A. mostly proteins.
B. phospholipids, proteins, and carbohydrates.
C. carbohydrates and lipids.
D. only phospholipids.
E. cellulose and carbohydrates.
The nucleus can communicate with the cytosol via nuclear pores.
True
False
Most proteins can easily move across the plasma membrane.
True
False
Nonciliated columnar epithelium often contains microvilli and goblet cells.
True
False
The different types of epithelia are named according to
A. location and type of secretion.
B. cell size and shape.
C. cell shape and location in the body.
D. location and number of layers of cells.
E. cell shape and number of layers of cells.
The tissue lining body cavities is
A. connective tissue.
B. nervous tissue.
C. skeletal tissue.
D. muscle tissue.
E. epithelial tissue.
Goblet cells are found in which of the following tissues?
A. nervous tissue
B. cuboidal epithelium
C. columnar epithelium
D. none of the above
E. connective tissue
The skin belongs to the
A. integumentary system
B. skeletal system
C. circulatory system
D. muscular system
E. nervous system
The cells producing the pigment responsible for skin color are the
A. melanocytes
B. Adipocytes
C. Langerhans cells
D. Merkel cells
E. keratinocytes
The layer of the epidermis which contains cells capable of continued cell division is the
A. stratum corneum
B. stratum granulosum
C. stratum lucidum
D. stratum basale
E. stratum spinosum
The dermis contains both elastic and collagen fibers.
True
False
The brain is protected by cranial bones.
True
False
Bone continuously replaces itself throughout adult life.
True
False
In adults, the medullary cavity contains red bone marrow.
True
False
The decrease of estrogen levels in females after the age of 40 increases the loss of calcium from bones.
True
False
A strain is always more serious than a sprain.
True
False
Freely moveable joints are called
A. amphiarthroses.
B. symphysis.
C. diarthroses.
D. gomphosis.
E. synarthroses.
The scientific study of joints is called
A. arthrology.
B. anthropology.
C. orthoscopy.
D. archeology.
E. rheumatology.
Which of the following is a cartilaginous joint?
A. syndesmosis
B. gomphosis
C. suture
D. diarthrosis
E. symphysis
Which of the following muscles adducts the thigh and flexes the leg?
A. tibialis anterior
B. rectus femoris
C. gastronemicus
D. gracilis
E. flexor digitorum longus
The sarcomere is the area between two
A. I bands.
B. H zones.
C. B lines.
D. Z discs.
E. A bands.
A muscle that produces an upward movement is a
A. depressor.
B. tensor.
C. levator.
D. pronator.
E. flexor.
Which of the following is NOT a function of muscle tissue?
A. Control of the volume of a hollow organ
B. Vitamin D production
C. Heat production
D. Body movements
E. Body position
Saltatory conduction refers to the conduction of impulses in
A. all axons.
B. cardiac muscle.
C. unmyelinated fibers.
D. skeletal muscle.
E. myelinated fibers.
Depolarization of a membrane is begins with the
A. opening of potassium channels.
B. closing of sodium channels.
C. opening of chlorine channels.
D. closing of potassium channels.
E. opening of sodium channels.
The period of time during which the neuron cannot generate another action potential is called
A. refractory period.
B. repolarization.
C. threshold period.
D. hyperpolarization.
E. depolarization.
Neurons conducts impulses completely. This is called the:
A. threshold.
B. refractory period.
C. electrical excitability.
D. All or none principle.
E. hyperpolarization.
Which of the following cranial nerves is sensory only?
A. olfactory
B. facial
C. glossopharyngeal
D. oculomotor
E. hypoglossal
The cervical enlargement contains nerves that supply the
A. upper limbs.
B. lower limbs.
C. thorax.
D. vertebral column.
E. None of the above.
The thalamus is found in the region of the brain known as the
A. diencephalon.
B. cerebellum.
C. brain stem.
D. cerebrum.
E. hypothalamus.
The dorsal root contains
A. autonomic fibers only.
B. sensory fibers only.
C. both sensory and motor fibers.
D. motor fibers only.
E. somatic fibers only.
The ganglia that run vertically along both sides of the backbone are the
A. prevertebral ganglia.
B. dorsal root ganglia.
C. terminal ganglia.
D. sympathetic trunk ganglia.
E. superior mesenteric ganglia.
The first motor neuron in an autonomic pathway is called a
A. postganglionic neuron.
B. parasympathetic neuron.
C. autonomic ganglion.
D. preganglionic neuron.
E. sympathetic neuron.
The autonomic nervous system
A. innervates skeletal muscles.
B. has one motor neuron from the CNS to the effector.
C. is always excitatory.
D. is under voluntary control.
E. operates without conscious control.
Sympathetic preganglionic neurons
A. are unmyelinated.
B. tend to be relatively long.
C. synapse in the terminal ganglion.
D. originate in the spinal cord.
E. originate in the brain.
A ringing in the ears is scientifically referred to as
A. otalgia
B. vertigo
C. trachoma
D. bellitus
E. tinnitus
The sense that tells us which muscles are contracted, the amount of tension in a joint, the position of the joints, and orientation of the head is called
A. gustation.
B. nociception.
C. proprioception.
D. adaptation.
E. touch reception.
The center of the eardrum is connected to the
A. incus.
B. stapes.
C. malleus.
D. vestibule.
E. cochlea.
The muscle responsible for changing the shape of the lens to improve near vision is the
A. superior oblique muscle.
B. arrector pili muscle.
C. superior rectus muscle.
D. ciliary muscle.
E. iris.
Which of the following is NOT a regulatory mechanism for acid/base balance in the body?
A. protein buffers
B. the kidneys
C. the digestive system
D. the respiratory system
A decrease in the normal metabolic rate:
A. results in the formation of more H+
B. causes more carbon dioxide to form as a metabolic waste product.
C. can potentially cause a state of acidosis
D. results in a higher plasma pH
Osmosis is considered the movement of solute particles from an area of greater concentration to an area of lesser concentration.
True
False
Which one is NOT an example of a passive transport mechanism?
A. Active transport
B. Simple diffusion
C. Facilitated diffusion
D. Osmosis
Facilitated diffusion requires the use of cellular energy (ATP) expenditure.
True
False
Put the steps of the process of excitation-contraction coupling in the correct order of occurrence.
1. Acetylcholine diffuses into the sarcolemma and binds to receptors in the muscle cell.
2. The end plate potential triggers a series of events that results in the contraction of a muscle cell.
3. An action potential in a motor neuron triggers the release of acetylcholine.
4. The resulting change in ion permeability triggers a depolarization of the plasma membrane called an end plate potential.
A. 1-2-4-3
B. 1-2-3-4
C. 3-1-2-4
D. 3-1-4-2
Contraction of a skeletal muscle that results from a single stimulus is called a ________.
A. contraction phase
B. tetanus
C. motor unit
D. twitch
Which of the following is NOT true regarding an isotonic contraction?
A. it occurs when a a muscle generates a force greater than the load the muscle is attempting to move.
B. skeletal muscle length changes.
C. it is an all-or-nothing event.
D. the speed of the contraction depends on the load that the muscle is attempting to move.
What is the major cation found inside the the typical nerve cell at rest?
A. acetylcholine
B. sodium
C. potassium
D. chloride
Regarding nerve impulses, which of the following changes occur when you increase the stimulus intensity?
A. The frequency of the action potentials increases.
B. The amplitude of the action potential increases.
C. The diameter of the action potential increases.
D. The resting membrane potential becomes more negative.
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