NLN NEX - SCIENCE QUESTIONS & ANSWERS
1. Fibrous tunic- Answers - In the diagram, the area labeled 2 is part of which layer of the eye?
Fibrous tunic
Sensory tunic
Reticular tunic
Vascular tunic
2. Sympathetic nervous system- Answers - After playing a strenous tennis match, a player experiences
increased heart rate, rapid breathing, and dilated pupils. Which branch of the nervous system is responsible for these
responses?
Autonomic nervous system
Central nervous system
Sympathetic nervous system
Parasympathetic nervous system
3. Cerebral Cortex- Answers - Amnesia in humans is the loss of memory. Which of these parts of the
brain has been attected when someone is suttering from amnesia cuased by head trauma?
Medulla oblongata
Spinal Cord
Cerebellum
Cerebral Cortex
4. Gastronemius and soleus- Answers - If a person cannot stand on tiptoes, which muscles may be too
weak?
Rectus femoris and vastus medialis
Pectoralis major and subclavius
Gastronemius and soleus
Biceps femoris and semimembranosus
5. Is where most of the cell's chemical reactions take place- Answers - All living
cells contain cytoplasm, which is important b/c it...
,Carries hereditary traits
Produces protein
Is where most of the cell's chemical reactions take place
Controls what moves in and out of the cell
, 6. Fewer cones and a greater concentration of rods to collect the minimal light
for night vision.- Answers - Most vertebrates have cone cells in their eyes, which distinguish colors in
daylight. The rods are more sensitive to light, but do not distinguish colors. If a mamal is nocturnal, it has likely
evolved to have...
As many cones as there are rods to capture the colors at dusk/dawn
An absence of cones since nocturnal mammals only need rods to see black/white at night
Fewer cones and a greater concentration of rods to collect the minimal light for night vision.
More cones than rods to enable them to see the muted colors at night.
7. Diffusion- Answers - Whithin a living cell, the oxygen from a mixture of oxygen and carbon dioxide is used up.
This creates a concentration gradient across the cell membrane that draws in oxygen across the cell membrane from
the outside to the inside of the cell. This process is known by which of these terms?
Dittusion
Active transport
Osmosis
Cellular respiration
8. Lymphocytes- Answers - As part of the human immune response, which of these cells are responsible
for producing antibodies?
Macrophages
Suppressor cells
Helper cells
Lymphocytes
9. Atlanto-occipital joint- Answers - When a person nods their head yes/no, which joint allows for that
movement?
Coxal join
Atlanto-occipital joint
Temporomandibular joint
1. Fibrous tunic- Answers - In the diagram, the area labeled 2 is part of which layer of the eye?
Fibrous tunic
Sensory tunic
Reticular tunic
Vascular tunic
2. Sympathetic nervous system- Answers - After playing a strenous tennis match, a player experiences
increased heart rate, rapid breathing, and dilated pupils. Which branch of the nervous system is responsible for these
responses?
Autonomic nervous system
Central nervous system
Sympathetic nervous system
Parasympathetic nervous system
3. Cerebral Cortex- Answers - Amnesia in humans is the loss of memory. Which of these parts of the
brain has been attected when someone is suttering from amnesia cuased by head trauma?
Medulla oblongata
Spinal Cord
Cerebellum
Cerebral Cortex
4. Gastronemius and soleus- Answers - If a person cannot stand on tiptoes, which muscles may be too
weak?
Rectus femoris and vastus medialis
Pectoralis major and subclavius
Gastronemius and soleus
Biceps femoris and semimembranosus
5. Is where most of the cell's chemical reactions take place- Answers - All living
cells contain cytoplasm, which is important b/c it...
,Carries hereditary traits
Produces protein
Is where most of the cell's chemical reactions take place
Controls what moves in and out of the cell
, 6. Fewer cones and a greater concentration of rods to collect the minimal light
for night vision.- Answers - Most vertebrates have cone cells in their eyes, which distinguish colors in
daylight. The rods are more sensitive to light, but do not distinguish colors. If a mamal is nocturnal, it has likely
evolved to have...
As many cones as there are rods to capture the colors at dusk/dawn
An absence of cones since nocturnal mammals only need rods to see black/white at night
Fewer cones and a greater concentration of rods to collect the minimal light for night vision.
More cones than rods to enable them to see the muted colors at night.
7. Diffusion- Answers - Whithin a living cell, the oxygen from a mixture of oxygen and carbon dioxide is used up.
This creates a concentration gradient across the cell membrane that draws in oxygen across the cell membrane from
the outside to the inside of the cell. This process is known by which of these terms?
Dittusion
Active transport
Osmosis
Cellular respiration
8. Lymphocytes- Answers - As part of the human immune response, which of these cells are responsible
for producing antibodies?
Macrophages
Suppressor cells
Helper cells
Lymphocytes
9. Atlanto-occipital joint- Answers - When a person nods their head yes/no, which joint allows for that
movement?
Coxal join
Atlanto-occipital joint
Temporomandibular joint
