BIOLOGY HIGH SCHOOL

A person sees a ball and kicks it, in part because of actions of the nervous system. Using the parts of the nervous system listed bellow, describe the path of nerve impulses that cause the person to see the ball• brain
• motor neurons
• sensory neurons
• spinal cord

Answers

Answer 1
Answer: The signal will start from the eyes. The message is carried by sensory neurons to the spinal cord. There, the "impulse" will transfer to motor neurons which will carry it to the brain. So in short:

Sensory neurons --> spinal cord --> motor neurons --> brain

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Which of the following is True for valence electrons?A) Valence electrons are always located in the innermost energy level
B) Each element in the periodic table has a different number of valence electrons.
C) Valence electrons may be lost or gained by an atom when bonding occurs with another atom
D) When atoms collide with other atoms, they bond automatically

Answers

Answer: Option (C) is the correct answer.

Explanation:

Electrons present in the outermost shell of an atom are known as valence electrons.

For example, atomic number of calcium is 20 and its electronic configuration is 2, 8, 8, 2. This means that there are 2 valence electrons in a calcium atom.

These valence electrons can be lost or gained by an atom according to the octet rule and ability to gain stability.

Hence, we can conclude that the statement valence electrons may be lost or gained by an atom when bonding occurs with another atom, is True for valence electrons.

Valence electrons may be lost or gained by an atom when bonding occurs with another atom. The correct option is C.

Valence electrons are the electrons in the outermost energy level, also known as the valence shell, of an atom. These electrons are involved in the bonding behavior of atoms, determining how they interact with other atoms to form chemical compounds.

When atoms come into contact and form chemical bonds, valence electrons can be shared, transferred, or rearranged between the atoms.

This process occurs to achieve a more stable electron configuration for each atom involved.

In some cases, atoms may lose valence electrons to become positively charged ions.

This occurs when an atom has fewer valence electrons than the stable, full outer electron shell configuration. These positively charged ions are called cations.

Thus, the correct option is C.

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Technology best described as :A: A system the government uses to oversee scientist
B; an organized method for doing scientific research
C: the use of science to answer ethical question
D: the application of science to solve practical problems

Answers

option d. the application of science to solve practical problems

Changing a river into a lake is basically what a large dam does. One reason we do this to create reservoirs of fresh water. However, dams change the local ecosystem in a big way. What is one negative impact of building a dam

Answers

One negative impact of building a dam could be that it affects natural habitats of animals who live in and around the river. When you build a dam, the river's height becomes smaller because a huge amount of water becomes technically removed or blocked. This can affect animals such as fish or beavers or anyone who needs that water.

Nerves at the roots of hair follicles to detect pain, temperature, itch, and hair movement are called _____.Merkel's disks
Meissner's corpuscles
Pacinian corpuscles
free nerve endings

Answers

Answer: Free nerve endings

Explanation:

A free nerve ending can be defined as the bare nerve endings that are unspecialized afferent nerve fibers which sends its signal to sensory neuron.

The main function of these nerve endings is to being the signals to the brain from the periphery of the body. They can sense itch, hair movement, temperature, pain et cetera.
The free nerve endingscan detect pain, temperature, itch and hair movement. Merkel's disks can detect pressure, position and static touch features. Pacinian corpuscles are sensitive to vibration while Meissner's corpuscles are sensitive to light and touch.

1. What function does the shape of the star­nosed mole’s nose serve? It helps the mole breathe under water.
It helps the mole eliminate excess heat.
It helps the mole find food.
It helps the mole dig out its burrow.
2. Which of the following do all animals not need to do in order to survive
capture prey.
obtain oxygen.
eliminate waste
avoid predators.
3. How would having a prehensile tail help a tree­dwelling chameleon?
Its tail would help it grasp branches.
Its tail would help it capture food.
Its tail would help it balance in the treetops.
Its tail would help it maintain homeostasis.
4. Which of the following is an animal waste product?
oxygen
carbon dioxide
water
energy
5. Which of the following must an animal do to survive?
Reproduce.
Breathe air.
Maintain homeostasis.
Dig a burrow

Answers

1. What function does the shape of the star­nosed mole’s nose serve?
It helps the mole find food.
2. Which of the following do all animals not need to do in order to survive 
capture prey.
3. How would having a prehensile tail help a tree­dwelling chameleon? 
Its tail would help it grasp branches 
4. Which of the following is an animal waste product? 
carbon dioxide 
5. Which of the following must an animal do to survive? 
Maintain homeostasis

The theory of evolution through natural selection is considered a scientific theory because _____.

Answers

The theory of evolution through natural selection is considered a scientific theory because it is broad enough in scope to explain many observations, it is supported by a massive body of evidence from many disciplines and it is general enough to provide many testable hypotheses.
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