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katovenus [111]
3 years ago
13

Extension (or straightening) of the elbow stops when the proximal end of the ulna engages the ________. trochlea of the humerus

olecranon fossa of the humerus coronoid fossa of the humerus medial epicondyle of the humerus.
Biology
1 answer:
Ivahew [28]3 years ago
3 0

Extension or straightening of the elbow stops when the proximal end of the ulna engages the olecranon fossa of the humerus.

Explanation:

Extension of the elbow is the straightening of the forearm or bringing it back to its anatomical position by the triceps brachii and the anconeus muscles.

The elbow joint, a hinge type of joint, is formed at the conjunction of humeral distal end with the ulnar proximal end.

Olecranon process is a structure at the ulnar distal end which fits exactly into the olecranon process at the humeral proximal head with the arm in extended position.

Olecranon fossa is a <em>triangular</em> depression or fossa which is deep in the posterior humerus. So the range of motion due to extension of forearm terminates or limits at the contact of the ulnar olecranon process with that of the humeral olecranon process at the olecranon fossa.

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Discribe 2 different types of bird nests and list their forms and functions​
valina [46]

Answer:

there r not only 2 types of nests

Cup nest.

Adherent nests.

Platform nests.

Earth-hole nests.

Ground and mound nests.

Scrape nests.

Explanation:

6 0
3 years ago
What is the pH if 20 mL of pH = 2 solution is diluted to a final volume of 600 mL?
Mashutka [201]

Explanation:

Hydrogen atoms contain 1 proton and 1 electron while being devoid of neutrons. When they lose their electron they form an ion or H+, a particle carrying a unit of positive charge.  pH measures how basic or acidic a water-based solutions are, with a formula for pH is

pH = -log[H+].

...where pH is -base 10 log of the concentration of hydrogen ions within the solution.

Initial volume= 20 mL

Final volume= 600 mL

# of dilutions= \frac{600}{20} = 30

for a pH 2= [H+]= 10^{=2}

∴ [H+]=  \frac{10^{-2}}{30} = 3.333 * 10^{-4}

and pH is an antilog of [H+]= - log \frac{10^{-2}}{30} = 3.333 * 10^{-4}

∴pH = 3.47

Learn more about pH at brainly.com/question/4981491

Learn more about pKA at brainly.com/question/11062486

#LearnWithBrainly

7 0
3 years ago
In guinea pigs hair straightness or curliness is thought to be governed by a single pair of alleles showing incomplete dominance
Nimfa-mama [501]

Answer:

Frequency of allele S is p = 0.4939

Frequency of allele C is q = 0.666

The population is not in Hardy-Weinberg equilibrium

Explanation:

Given -

Number of individuals with straight hair = 244

Number of individuals with curly hair = 444

Number of individuals with Wavy hair = 312

Let "p" represents the frequency for allele for straight hair and "q" represents the frequency for allele for curly hair

p^2 represents the frequency of genotype "SS"

p^{2} = \frac{244}{1000} \\= 0.244

q^2 represents the frequency of genotype "CC"

p^{2} = \frac{444}{1000} \\= 0.444

2pq represents the frequency of genotype "SC"

2pq = \frac{312}{1000} \\= 0.312

Frequency of allele S is p

= \sqrt{0.244} \\= 0.4939

Frequency of allele C is q

tex]= \sqrt{0.444} \\= 0.666[/tex]

For being in Hardy Weinberg's equation-

p+q=1\\

Substituting the values in above equation, we get -

0.4939+0.666\neq 1

hence, the population is not in Hardy-Weinberg equilibrium

4 0
3 years ago
In a 2 allele system, if the allele frequency for "t " is 0.84 , what is the allele frequency for " T " ?
algol13

Answer:

0.16

Explanation:

0.16 = 1-0.84

they are complementary

3 0
3 years ago
PLEASE HELP I REALLY NEED HELP! 25 points!
AnnyKZ [126]
Is their possibly a chart that accompanies this question, or is that it?
4 0
3 years ago
Read 2 more answers
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