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Displaying 231-240 of 241 results.

What causes the inside of a neuron to become negatively charged?

 

Posted 2 years ago by GJ403 in Biology 30 | 0 answers
#neuron 

An excitatory neurotransmitter such as GABA will open up ion channels in the
postsynaptic membrane. This will allow sodium (Na+) and potassium (K+) ions
to follow into the dendrite, increasing the membrane potential closer to 0 mV,
thereby increasing the likelihood for an action potential to occur. Similarly, an
inhibitory neurotransmitter will open up the ion channels for chloride ions (Cl–) to
flow in.

The effect of the inhibitory neurotransmitter on the postsynaptic membrane is to

 

Posted 2 years ago by ryderpatten in Biology 30 | 0 answers
#receptors 

Myopia is a condition in which a person has light rays focusing I front of the retina due to?

Posted 1 year ago by katiesmith in Biology 30 | 1 answers
#sensory pathway 

Explain how the signal transmission at a synapse in an individual with Parkinson's disease is different than an unaffected individual

Posted 1 year ago by katiesmith in Biology 30 | 0 answers
#signal transmission between neurons 

Which of the following statements about sex determination is false?
a.
XX females can develop male sex organs in the presence of testosterone.
b.
The testis-determining factor gene on the Y chromosome stimulates the production of male hormones.
c.
To be genetically male, one X chromosome and one Y chromosome are required.
d.
XY males will develop male sex organs without the presence of androgens.
Clear my choice
 
 
 
 
 

Posted 1 year ago by lea123 in Biology 30 | 1 answers
#biology 30 

Which of the following statements correctly describes the effects of high testosterone levels in a male?
a.
Increased levels of testosterone decreases the release of FSH and LH
b.
Increased levels of testosterone stimulates the release of GnRH
c.
Increased levels of testosterone result in increased sperm production
d.
Increased levels of testosterone stimulates the release of FSH and LH.

Posted 1 year ago by katiesmith in Biology 30 | 0 answers
#male reproductive 

Which of the following statements does NOT describe the role of progesterone in the female reproductive system?

 

Posted 10 months ago by jiakash27 in Biology 30 | 0 answers
#reproductive 

which of the following is the correct calculation of the baby's age from the moment of fertilization, assuming a 28-day ovarian cycle? 

Posted 5 months ago by kkkayab in Biology 30 | 0 answers
#biology 30 #female reproduction #pregnancy 

Hemophilia is a sex-linked recessive trait. A male hemophiliac and phenotypically normal female have a son with hemophilia. 
They would like to have one more child. What is the probability of having a child without hemophilia? Explain using a Punnett square. (2 marks)  Is it possible for a girl to be born with hemophilia? Explain. (1 mark) 

Posted 4 months ago by in Biology 30 | 0 answers
#biology 30 

match each structure in the reflex arc numbered above with its description given below

 

Posted 2 months ago by Laurynanna1 in Biology 30 | 0 answers
#the nervous system 

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