1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lapatulllka [165]
3 years ago
15

Explain how parts of the upper limb from a first-class lever and a third-class lever

Biology
1 answer:
Jobisdone [24]3 years ago
7 0
A) The first class lever: In this type of lever, <span> the fulcrum in the middle, the force is applied on one side of the fulcrum and the resistance on the other.
When the upper limb strengthens at the elbow,
the forearm bones are the rigid bar, the hand that moves against the resistance by pulling something heavy is the resistance, and the elbow joint is  the fulcrum. The triceps muscle, located on the posterior side of the arm does the force. </span>
<span>
B) A third-class lever in the upper limb is formed when the radio and the ulna bones are the rigid bar of the lever, the elbow joint is the fulcrum, the hand moves against the resistance provided by its weight, and the force is done by muscles like the biceps . This is a third class lever because the parts of this lever are arranged in the sequence resistance(hand)-force(muscles)-fulcrum(elbow). This type of lever also exists in the mandibular bone. Since this may be more complicated to understand, i attached a photo.</span>


You might be interested in
What is the purpose of a food chain?
kvasek [131]

Answer:

Food chains are a pictorial description of an ecosystem: what eats what. This helps scientists track the web of interdependence. If one important component in a chain is removed or affected, we can make predictions about how this might impact the entire ecosystem. We can track the effects of disruptions on a system.

7 0
3 years ago
Read 2 more answers
Animals have two major types: _____. aquatic and terrestrial, vertebrates and invertebrates, coelomates and acoelomates, sexual
Alexxandr [17]
The correct answer is the second option. Animals have two major types: vertebrates and invertebrates. Vertebrates are animals that have backbone while the invertebrates do not have one. Examples for vertebrates are birds and mammals while the latter are insects and squid.
6 0
3 years ago
Where should the label for the dependent variable be written for this scatter plot?
Nezavi [6.7K]

Answer:

B. Position B

Explanation:

The values for dependent variable are plotted on the y-axis (vertical) on a scatter plot. Therefore, the label for the dependent variable would be written along the vertical axis for the scatter plot, at position B.

The label for independent variable would be written along the horizontal axis for the scatter plot, at position C.

The answer is "B. Position B"

4 0
3 years ago
How does the structure of a protein affect the functions of muscle contraction
marshall27 [118]
<span>Since muscle contraction depends on interactions between actin, myosion and some intermediate molecules, the primary protein structure of such proteins and their spatial conformation are fundamental for their functioning. For example, actin and myosin, both filamentous proteins that slide past each other or troponin/tropomyosin interactions that blocks the binding of myosin to actin.</span>
6 0
3 years ago
Two types of Nucleic Acids are ??
Jobisdone [24]

Answer:

the answer is D) DNA and RNA

5 0
3 years ago
Other questions:
  • In the sodium-potassium pump, how many sodium ions are moved AND what direction do they<br> move?
    10·1 answer
  • Explain how XY mice with a duplication of chromosome 1 develop<br> ovaries and a female phenotype.
    8·1 answer
  • A 30-year-old gravida 1 para 0 experienced a miscarriage at 10 weeks' gestation. she is rh negative. in light of this informatio
    13·1 answer
  • Why is the cell cycle important in multicellular organisms?
    5·1 answer
  • When glycogen phosphorylase is phosphorylated Group of answer choices its activity decreases. its activity increases. its activi
    11·1 answer
  • What is the first phase of mitosis
    7·2 answers
  • Is the tube that carries blood, oxygen, and nutrients from the placenta to the developing child?
    9·1 answer
  • Please select the word from the list that best fits the definition
    10·1 answer
  • which of the following is the most important prognostic factor in the survival of patients with breast cancer?
    12·1 answer
  • What are organic molecules?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!