questions

I need some help for those questions, thank you

To lower blood acidity,

a. Hydrogen ions are excreted, and bicarbonate ions are reabsorbed
   c. Hydrogen ions and bicarbonate ions are reabsorbed
b. Hydrogen ions are reabsorbed, and bicarbonate ions are excreted   d. Hydrogen ions and bicarbonate ions are excreted.

A karyotype is prepared

a. for an unborn child through amniocentesis chorionic villi sampling
   c. as a means of diagnosing an abnormal chromosome disorder
b. by arranging chromosomes into pairs by size, shape, and banding patterns   d. all of the above are correct.

Spongy bone
a. Contains osteons
   c. Lends no strength to bones
b. Contains red bone marrow, where blood cells are formed.   d. All of these are correct.

Muscles are covered by fibrous connective tissue called the

a. Fascicle
   c. Fascia
b. Tendon   d. Retinaculum

7.A reflex arc

a. Always involves the spinal cord
   c. Usually involves only one sensory and one motor neuron
b. Occurs only in the arms and legs   d. Allows a quicker response than voluntary movement.

8.A sensory receptor
a. Is the first portion of a reflex arc
   c. Can be integral or external
b. Initiates nerve impulses   d. All of these are correct.

9.The hypothalamus does not:

a. Control skeletal muscles
   c. Control the pituitary gland
b. Regular thirst   d. Regulate body temperature

10.Retinal is

a. A derivative of vitamin A
   c. A part of rhodopsin
b. Sensitive t light energy   d. All of these are correct.

11.   Growth hormone is produced by the
a. Posterior adrenal gland
   c. Kidneys
b. Posterior pituitary   d. Anterior pituitary .

12. By what process are most molecules secreted from the blood into the tubule?

a. Osmosis
   c. Active transport
b. Diffusion   d. Facilitated diffusion