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ololo11 [35]
2 years ago
14

Compare the use of the siphon in clams and squid

Biology
1 answer:
inna [77]2 years ago
7 0

Explanation:

  1. Siphons in Mollusca are tube-like structures in which water (or, more rarely, air) flows. The water flow is used for one or more purposes such as locomotion, feeding, respiration, and reproduction.
  2. The siphon propels the squid through the water in the opposite direction to which the siphon is pointing, much like jet propulsion. To use this jet propulsion, the squid takes in water through the large opening and then closes off the opening.

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Enkephalins and endorphins are peptides that act like morphine. True or False
mariarad [96]

Answer:

True.

Explanation:

Enkephalins and endorphins are endogenous peptides while morphine is an exogenous peptide.

Enkephalins and endorphins are powerful analgesics 18 to 500 times more than morphine. Hence, morphine is less analgesic than enkephalins and endorphins.

Enkephalins and endorphins act on the  mu, kappa , delta receptors and morphine also acts on the same receptors. All of them has same effects on the body.

Hence, Enkephalins and endorphins are peptides that act like morphine.

4 0
3 years ago
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Since the Wicked Witch from the Wizard of Oz melted away when she was doused with water, what do you think her cell membranes we
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Answer:

silicone

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3 years ago
Water that freezes and expands in cracks and spaces between rocks will cause..
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frost/ ice wedging....

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3 years ago
What function do decomposers provide in a food web?They produce organic compounds in the presence of sunlight and chlorophyll.Th
andrey2020 [161]

Answer:

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4 0
2 years ago
Which of the following statement(s) is/are true regarding the adrenal glands' relationship with the autonomic nervous system?
Studentka2010 [4]

Answer:

The true statements regarding the adrenal glands' relationship with the autonomic nervous system are:

a. The adrenal cortex is an extension of the parasympathetic nervous system.

c. The adrenal glands are strictly nerve tissue.

d. The parasympathetic division stimulates the adrenal cortex to secrete glucocorticoids.

e. The adrenal medulla is penetrated by the fibers of the sympathetic nervous system.

Explanation:

The  levels of the central nervous system which play important roles in influencing the autonomic nervous system include cerebral cortex, hypothalamus, brain stem, and spinal cord.  Usually, epinephrine (adrenaline) and norepinephrine are released into the blood stem when stress or a threat occurs.  This alert serves as a warning signal and defense system.  The purpose is to maintain homeostasis.

4 0
3 years ago
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