The most important baroreceptors involved in the moment-to-moment regulation of blood pressure are located in the:
a. medulla and glossopharyngeal nerve
b. internal carotid and vagus nerve
c. carotid sinus and aortic arch
d. glossopharyngeal nerve and vagus nerve
e. medulla and carotid sinus
(
Question 2) Identify the incorrect statement about cones in the retina:
a. They are used for day vision.
b. They are very sensitive to light.
c. They exhibit high acuity.
d. They are concentrated in the fovea.
e. They provide color vision.
(
Question 3) Circulatory shock from extensive loss of blood volume is known as:
a. cardiogenic shock
b. vasogenic shock
c. neurogenic shock
d. extensive shock
e. hypovolemic shock
(
Question 4) Which of the following activities occurs in the presence of light within the phototransduction pathway?
a. Ganglion cells stimulate bipolar cells.
b. cGMP levels increase within photoreceptors.
c. Bipolar cells produce graded potentials.
d. Sodium channels open in photoreceptors.
e. None of the above.
(
Question 5) Hypertension is defined as blood pressure above:
a. 120/70 mm Hg
b. 130/75 mm Hg
c. 140/90 mm Hg
d. 150/95 mm Hg
e. 160/100 mm Hg
(
Question 6) Cones
a. are most abundant in the periphery of the retina
b. are more numerous than rods
c. have high sensitivity to light
d. are responsible for color vision
e. exhibit more than one of the above characteristics
(
Question 7) Where are the chemoreceptors located that are sensitive to low oxygen or high acid levels in the blood?
a. medulla in the brain stem
b. right atrium
c. carotid and aortic arteries
d. apex of the heart
e. vena cava
(
Question 8) Rhodopsin
a. is the photopigment in the red cones
b. consists of an opsin and retinal
c. is most highly concentrated in the fovea
d. is slowly broken down in the absence of light
e. contains a derivative of vitamin B12
(
Question 9) Mean arterial pressure within the circulatory system is constantly monitored by:
a. heart sensors
b. baroreceptors
c. endothelial cells
d. pressure sinuses
e. ganglions
(
Question 10) The choroid
a. contains rods and cones
b. is a fluid within the eye
c. is also known as the blind spot
d. is the middle layer of the eye
e. refracts light rays
Quick Reply
