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3 years ago

What is the role of a spinal cord in a human body

Biology

1 answer:

AysviL [449]3 years ago

6 0

Answer:

To transport signals to the rest of the body and to keep the body upright.

Explanation:

To protect the nerves and keep the body upright. This is because if your spine is broken, then you become paralysed therefore it's an extremely important aspect for the body.

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Give two reasonsthat may account for the continuous firing of a PostsynapticNeuron.

lyudmila [28]

Answer:

1.Continuous diffusion of negatively charged ions into the postsynaptic neurons , which leads to continuous reversal of charges (hyperpolarization) and therefore continuous firing of action potential

2. Inhibition of hydrolytic enzymes e.g (acetycholinesterase) that metabolize activities of cholinergic neurotransmitters e,g acetycholine at post synaptic cleft. leading to firing of action potential.

Explanation:

Neuron whose dendrites transmits action potential to the neuromuscular junction is called presynaptic neuron. While neuron that transmit action potential away from the neuronal synaptic junction, or from the neuromuscular junction to the cell body of adjacent neuron or to effectors (gland and muscles) are called post synaptic neuron.

The more negatively charged ions that diffused into the post synsptic neuron, the more depolarization, and the greater the frequency of action potential produced

The inhibition of activities of hydrolytic enzyme which metabolize cholinergic neurotransmitter leads to continuous excitatory activities of cholinergic neurotransmitters on the receptors at the postsynaptic neuron, and the more action potential

6 0

2 years ago

Animals with photoreceptors have good vision. a. True b. False

jarptica [38.1K]

Photoreceptors are cells in the retina that begin the process of seeing. The retina is the back part of the eye that contains the cells that respond to light. These specialized cells are called photoreceptors. They absorb and convert light into electrical signals. These signals are sent to other cells in the retina and ultimately through the optic nerve to the brain where they are processed into the images we see. The answer is true. Animals with photoreceptors have good vision.

5 0

2 years ago

Hair Coloring Experiment

leva [86]

The independent variable (hair colorin) causes a response in the dependent one (colorin effectiveness). The constant variable can not change (curly or straight), the control variable is kept constant (time and environmental conditions). The experimental group receives the treatment (40 students).

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INDEPENDENT VARIABLE

Refers to all the variables in an experiment that provoke a response in another variable. The independent variable is modified to analyze its effects on another variable. The researcher changes on purpose the independent variable to observe the response of the dependent variable.

In the exposed example, the independent variable is the red hair coloring

- Red Hair Paint

- L’Oreal

DEPENDENT VARIABLE

Refers to the variable, which response depends on any change in the independent variable. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable.

In the exposed example, the dependent variable is the coloring effectiveness, seen through how well the coloring takes and lasts.

CONSTANTS

This variable does not change during the whole experiment and under any circumstance. It can not change.

In the exposed example, the constant variable is the type of hair, curly or straight.

CONTROL

Controlled variables are kept constant in the control groups and the experimental groups. Unlike the independent variable, the controlled variables do not influence the results. These variables do not affect the response of the dependent variable.

In the exposed example, the controlled variables are the exposure time to the colorings and environmental conditions, such as temperature, humidity, etc.

EXPERIMENTAL GROUP

The experimental group receives the treatment. The researcher apply different treatments to the experimental groups to observe how they affect the dependent variable. There can be several experimental groups.

In the exposed example, the general experimental group is the 40 students' hairs. Because coloring does not have the same effect on different hair colors, the experimental group includes,

- 10 blonds,

- 10 brunettes,

- 10 with black hair

- 10 with red hair

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Related link: brainly.com/question/24653783

5 0

2 years ago

An explanation for a biological process that is substantiated by a large body of evidence is called a

mixer [17]

An explanation for a biological process that is substantiated by a large body of evidence is called a theory.

Good luck!

3 0