Which is true concerning the development of a living cell? A. Each gamete provid

Question

Which is true concerning the development of a living cell?

A. Each gamete provides 46 chromosomes (at fertilization) producing a human cell which possesses 92 chromosomes.

B. Each gamete provides 92 chromosomes (at fertilization) producing a human cell which possesses 184 chromosomes.

C. Each gamete provides millions & billions of chromosomes (at fertilization) producing a human cell which possesses an infinite number of chromosomes.

D. Each gamete provides 23 chromosomes (at fertilization) producing a human cell which possesses 46 chromosomes.

The production of ATP (cellular respiration) is actually a(n) __________________________ rxn, However, the reaction requires the breakdown of Glucose, which is energetically, __________________________________.

            a. endergonic :   exergonic

            b. exergonic : endergonic

            c. catabolic : neutral

            d. dehydration : unstable

The hormone that stimulates glycogenolysis is:

            A. glucagon

            B. insulin

            C. ADH

            D. thyroid hormone

The nervous system controls skeletal muscles through a specialized synapse called the:

            A. troponin complex

            B. neuro-muscular junction

            C. sarcoplasmic reticulum

            D. sarcomere

The functional unit of a skeletal muscle fiber (Z-line to Z-line) is called the:

            A. troponin-complex

            B. neuro-muscular junction

            C. sarcoplasmic reticulum

            D. sarcomere

The Calcium, that ultimately stimulates cross-bridge formation and the contraction of a skeletal muscle, bursts from the ____________________ of the muscle fiber.

            A. troponin-complex

            B. neuro-muscular junction

            C. sarcoplasmic reticulum

            D. sarcomere

Two specific hormones control our extracellular Calcium concentration. One of these hormones, Calcitonin, causes “bone deposition”; the other hormone, PTH, causes “bone resorption”. So, which of the following dysfunctions would lead to the development of osteoporotic (weak) bones?

            A. hyperaldosteronism

            B. hypercalcitoninism

            C. hypercortisolism

            D. hyperparathyroidism

Which of the following dysfunctions would lead to the development of osteoporotic (weak) bones?

            A. hypoaldosteronism

            B. hypocalcitoninism

            C. hypocortisolism

            D. hypoparathyroidism

Explanation / Answer

1. D. Each gamete provides 23 chromosomes (at fertilization) producing a human cell which possesses 46 chromosomes.

2. a. endergonic :   exergonic

3. A. glucagon

4. B. neuro-muscular junction

5. D. sarcomere

6. C. sarcoplasmic reticulum

7.  D. hyperparathyroidism

8. B. hypocalcitoninism

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