The dorsal root of a spinal nerve contains? A. Motor fibers B. Sensory fibers C.

Question

The dorsal root of a spinal nerve contains? A. Motor fibers B. Sensory fibers C.antonomic fibers D.sensory gangalia E. all of the above

2. Unspecilazed spindle shaped cells derived from mesenchyme which develop into osteoblasts are called? A. Osteoclasts B.osteocytes C.ostemedullary cells D. Osteoprogenitor cells E.chondrocytes

3.the hypothalamus is the control center for A. Emotions B.thirst C.hunger D.all of the above E.none of the above

4. A person suffering from high blood pressure would take a(an) A.betablocker B.alpha blocker C.gamma blocker D.nicotine blocker E.none of the above

5. The hormone that increases the reabsorptivr activity of specific bone cells and increases blood calcium level is? A. Calcitonin B. Pituitary hormones C.estrogen D.parathyroid hormones( parathormone E.thyroxine

6.the Sagittal suture is formed by the junction of the following two bones? A. The two parietal bones B. The rental and parietal bones C.the occipital and sphenoid bones D. The temporal and occipital bones E.the frontal and maxillary bones

7.the primary function of simple squamous epithelium is? A. To move materials by cilliary action B. To secrete substance C.to form a diffusion and filtration membrane D. To actively absorb solutes E.all of the above

8. Excluding the bones of the pectoral girdle, how many bones are there in one upper extremity ? A. 18 B.24 C.30 D.33 E.60

9. Interneurons can be classified as excitatory or A. Sensory B.motor C.somatic D.inhibitory E. visceral

10. The outermost coverings of the spinal cord is the A. Dura meter B.arachnoid C. Pia meter D.Cranial meninges E.cerebrospinal fluid.

11. Proprioreceptors A.montior the position of skeleton muscles and joints B.monitor smooth muscles C. Provide information about the external environment D.are kind of motor neurons E. are efferent in nature

12. Gray matter of the brain consists mainly of A. Unmyelinated axons B.myelinated axons C.nerve cells bodies D. Nodes E. dendrites

13. Where would you be most likely to find a macrophage? A. Loose( areolar) connective tissue B.muscles C. Nerves D.sqamous epithelium E cuboidal epithelium

14. Organs are to organisms as A. RNA is to DNA B. Organs are to tissue C. System are to tissue D. Tissues are to cells E. organelles are to cells

15. The action potential is transmitted from the neurons to the muscle cells by A. Sparks B.acetylcholine C.calcium D.acetycholinesterase E.none of the above

16. The _______ contains receptors for acetylcholine A. Synaptic knob B.motor end plate C.neuro muscular junction D.synaptic cleft E.transverse tubule.

Explanation / Answer

Answer:

1). B. Sensory fibers

The dorsal root of a spinal nerve contains axon of sensory neurons.

2). D. Osteoprogenitor cells

Oteogenic cell is an unspecialized stem cell that is the only bone cell that can undergo cell division; the resulting cells develop into osteoblasts.

3). D.all of the above

Functions of the hypothalamus are

a) produces hormones
b) plays a major role in regulating homeostasis,
visceral activity and temperature
c) regulates certain emotions like rage, sexual
arousal, aggression, pain and pleasure
d) regulates eating and drinking behavior

4). B.alpha blocker

Alpha-blockers are medicines that are mainly used to treat high blood pressure (hypertension) and problems with passing urine in men who have enlargement of the prostate gland.

5). D.parathyroid hormones

Calcium levels in the blood are regulated by three hormones: calcitonin, parathyroid hormone (PTH), and vitamin D. When calcium levels rise, the hormone calcitonin acts to reduce blood calcium. When calcium levels are too low, PTH and vitamin D act synergistically to increase blood calcium.

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