Question

In: Anatomy and Physiology

7. The ascending tract of the spinal cord that is the primary conveyor of sensory information...

7. The ascending tract of the spinal cord that is the primary conveyor of sensory information after burning a hand is

a. fasciculus gracilis

b. corticobulbar tract

c. lateral spinothalamic tract

d. pyramidal tract

e. posterior spinocerebellar tract

8. Venous blood from the heart wall enters the right atrium through the

a. inferior vena cava

b. superior vena cava

c. pulmonary vein

d. coronary sinus

e. pulmonary artery

9. The region of the retina with the highest proportion of cones and almost no rods is the

a. optic disc

b. macula lutea

c. fovea centralis

d. amacrine cell layer

e. pigment epithelium

10. Blood return to the heart is powered by

a. massaging action of skeletal muscle in the general area of veins

b. negative pressure in the thoracic cavity

c. heart pumping

d. a and b

e. all of the above

11. The middle layer of the adrenal cortex that synthesizes glucocorticoids is the

a. zona fasciculata

b. zona reticularis

c. zona glomerulosa

d. zona corticosa

e. zona medullaris

12. The inferior rectus muscle of the eye

a. moves eyes laterally and is innervated by cranial nerve VI (abducens)

b. moves eyes medially and is innervated by cranial nerve III (oculomotor)

c. depresses eye and is innervated by cranial nerve III (oculomotor)

d. elevates eye and is innervated by cranial nerve III (oculomotor)

e. rotates eye and is innervated by cranial nerve VI (abducens)

13. In all cases

a. arteries carry blood away from the heart; veins carry blood towards the heart

b. veins carry blood away from the heart; arteries carry blood towards the heart

c. arteries carry oxygenated blood; veins carry deoxygenated blood

d. arteries carry deoxygenated blood; veins carry oxygenated blood

e. no such generalization can be made for all cases

14. The valve between the right ventricle and the pulmonary trunk is the

a. pulmonary semilunar valve

b. bicuspid valve

c. left atrioventricular valve

d. mitral valve

e. aortic semilunar valve

Expert Solution

7.

Ans. Lateral spinothalamic tract

This conducts sensation of pain and temperature to thalamus of brain.

Facilculus gracilis conducts sensory information from skin, muscles and joints. It senses touch,pressure and body movements.

Spinocerebellar tracts are for movement and position mechanism.

Corticobulbar tract are descending tract.

8.

Ans a. Inferior vena cava and b. Superior vena cava are correct answer.

Through inferior vena cava deoxygenated blood enters into heart from lower limbs and trunk while through superior vena cava blood gets drain from upper body parts.

Pulmonary vein and artery are related to blood transmission into lungs.

9.

Opt c. Fovea centralis

It is a central region of retina which provides most clear vision with no rods present.

Whereas macula lutea has most cones and few rods. Its an oval pigmented area near center of retina

10.

Opt d. Both a and b.

Sketal muscle pump helps blood to return to heart as well as negative thoracic pressure do help.

11. a. Zona fasciculata

12. b. Depresses eye and innervated by occulomotor

13. a. Artery carried away from heart and veins carries towords heart.

14. a. Pulmonary semilunar valve

Sydney Mullin answered 1 year ago

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