Question

(score for question 1: __ of 3 points)

1. some cells produce and secrete high levels of digestive proteins. which organelles would you expect to be abundant in those cells, and why?

answer:
type your answer here.
(score for question 2: __ of 3 points)

1. explain how active transport helps a nerve cell maintain its resting potential.

answer:
type your answer here.
(score for question 3: __ of 3 points)

1. the atlantic cod is a common fish of the atlantic ocean that must drink seawater to meet its water needs. explain how active transport helps the atlantic cod maintain homeostasis with regard to the balance of sodium and chlorine ions, which are abundant in seawater.

answer:
type your answer here.

Explanation:

1. For cells producing and secreting high - levels of digestive proteins, ribosomes are abundant for protein synthesis, rough endoplasmic reticulum for protein folding and transport, and Golgi apparatus for modifying, sorting, and packaging proteins for secretion.
2. Active transport in a nerve cell involves the sodium - potassium pump. It pumps 3 sodium ions out and 2 potassium ions in against their concentration gradients. This helps maintain the resting potential by keeping the inside of the cell more negatively charged compared to the outside.
3. The Atlantic cod uses active transport to move excess sodium and chloride ions out of its cells against their concentration gradients. This helps in maintaining homeostasis as it allows the cod to balance the ion concentrations in its body fluids despite drinking seawater which has high levels of these ions.

Answer:

1. Ribosomes, rough endoplasmic reticulum, and Golgi apparatus are expected to be abundant. Ribosomes synthesize proteins, rough ER is involved in protein folding and transport, and Golgi apparatus modifies, sorts, and packages proteins for secretion.
2. The sodium - potassium pump in a nerve cell uses active transport to pump 3 sodium ions out and 2 potassium ions in against their concentration gradients, maintaining the inside of the cell more negatively charged, thus maintaining the resting potential.
3. The Atlantic cod uses active transport to move excess sodium and chloride ions out of its cells against their concentration gradients, helping to maintain homeostasis in the face of high ion concentrations in seawater.