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Vinil7 [7]
1 year ago
6

Which of the following regarding puberty is FALSE? Select one: a. Early signs of puberty include breast budding in girls and gro

wth of the testes in boys. The first sure sign of puberty is menarche (first period) in women and nocturnal emissions (wet dreams) in men. b. A trigger is the maturation of the adrenal gland leading to production of androgens, which begins sometime between 6 and 8 years of age. c. It results in an increase of androgens in the female body and a decrease of androgens in the male body. d. In girls, it requires the proper fat/protein ratio for menarche to occur.
Biology
1 answer:
maks197457 [2]1 year ago
4 0

Answer: C

Explanation:

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Whales have a pelvic and leg bone, even though they do not walk on their legs. Which term is used by scientists to describe this
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The organs are known as Vestigial organs. The evolution from land-dwelling animal to the marine animals has led whales as well as dolphins, to lose hind limbs. The pelvic and leg bone serves no purpose in them and just provide the anchorage to muscles 
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3 years ago
Need help answering this thanks.
adell [148]

Answer:

its tongue and camouflage

Explanation:

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2 years ago
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Dual innervation by both the parasympathetic and sympathetic divisions of the ANS imparts what function to the organ
skad [1K]

Explanation:At each target effector, dual innervation determines activity. For example, the heart receives connections from both the sympathetic and parasympathetic divisions. One causes heart rate to increase, whereas the other causes heart rate to decrease.

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2 years ago
A researcher would like to determine the effect of caffeine on memory. Participants are randomly assigned to receive a caffeine
zhuklara [117]

Answer:

The placebo effect

Explanation:

The placebo effect in psychology refers to a situation in which participants in a research receive beneficial effects due to the administration of an inactive substance or a sham treatment. The positive beneficial effect received can then be attributed purely to believe and not to the treatment itself. A placebo treatment could produce a real healing effect like a true medical or psychological treatment.

The participants who received the sugar believed it to be a memory enhancing treatment hence the slight increase in memory capacity due to placebo effect.

5 0
3 years ago
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Why can information only pass in one direction across synapse?? pls help !!
klio [65]
A Nerve electrical impulse only travels in one direction. There are several reasons nerve impulses only travel in one direction. The most important is synaptic transport.
In order for a "nerve impulse" to pass from cell to cell, it must cross synaptic junctions. The nerve cells are lined up head to tail all the way down a nerve track, and are not connected, but have tiny gaps between them and the next cell. These tiny gaps are called synapses.
When you get a nerve firing, you have probably heard that it is an electrical impulse that carries the signal. This is true, but it is not electrical in the same way your wall outlet works. This is electrochemical energy. Neurotransmitters are molecules that fit like a lock and key into a specific receptor. The receptor is located on the next cell in the line. When the neurotransmitter hits the receptor on the next cell in line, it signals that cell to begin a firing as well.
This will continue all the way down the length of the nerve track. In a nutshell, a nerve firing results in a chain reaction down the nerve cell's axon, or stemlike section. Sodium (Na+) ions flow in, potassium (K+) ions flow out, and we get an electrochemical gradient flowing down the length of the cell. You can think of it as a line of gunpowder that someone lit, with the flame traveling down the length of it. Common electrical power is more like a hose full of water, and when you put pressure on one end, the water shoots out the other.
Therefore, nerve impulses cannot travel in the opposite direction, because nerve cells only have neurotransmitter storage vesicles going one way, and receptors in one place.
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2 years ago
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