momolGE BIANNCARRAINES as second messengers, after a G protein is activated 17.

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momolGE BIANNCARRAINES as second messengers, after a G protein is activated 17. In a signal transduction pathway involving phospholipid products the activated G protein then activates: a IP2 b. IPs e. protein kinase C. d. phospholipase C. e. adenylyl cyclase. 18. The principal mineralocorticoid is: a. ADH b. epinephrine. c. growth hormone. d. aldosterone. e. ACTH 19. The meninges are composed of: a. bone and dura mater only b. dura mater and arachnoid only c. arachnoid and pia mater only d. dura mater, pia mater, and arachnoid only. e. bone, dura mater, pia mater, and arachnoid. 20. Which of the following statements about the speed of impulse conduction in a neuron is true? a. Longer axons can transmit impulses faster than shorter ones. b. Unmyelinated axons transmit impulses faster than myelinated ones. c. Shorter axons can transmit impulses faster than longer ones. d. Nerve impulses travel faster than the speed of light. e. Unmyelinated axons with larger diameters transmit impulses faster than ones with small diameters. Figure 41-3 401 20 40

Explanation / Answer

18. The principal mineralocorticoid is aldosterone.

29. ACTH (Adrenocorticotropic hormone ) is a peptide hormones.

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