Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

Penyenggaraan Dan Kesinambungan Hidup (English)

KUIZ INI MENGANDUNGI 10 SOALAN

The transmission of a nerve impulse across a synapse involves the conversion of signals. What is the correct sequence of this conversion?

Electrical signal to mechanical signal to electrical signal

Chemical signal to mechanical signal to electrical signal

Electrical signal to chemical signal to electrical signal

Chemical signal to electrical signal to chemical signal

None

During hemodialysis, how are waste products like urea removed from the patient's blood?

They are chemically broken down by enzymes present in the dialysis fluid.

They diffuse from the blood into the dialysis fluid down a concentration gradient.

They are actively transported out of the blood by the dialysis machine.

They are filtered out using a high-pressure system similar to the glomerulus.

None

The functional unit of the kidney responsible for forming urine is the nephron. Which part of the nephron is primarily responsible for the selective reabsorption of glucose and amino acids?

Collecting duct

Proximal convoluted tubule

Glomerulus

Loop of Henle

None

What is the role of neurotransmitters such as acetylcholine and GABA?

To form the myelin sheath around the axon.

To provide energy for the transmission of nerve impulses.

To create a physical bridge for the impulse to cross the synapse.

To carry the chemical signal across the synapse to the next neuron.

None

What is the primary function of the myelin sheath that surrounds some axons?

To synthesize neurotransmitters for the neuron.

To act as an insulator and speed up impulse transmission.

To receive chemical signals from other neurons

To provide structural support to the cell body.

None

Which type of neuron is responsible for transmitting nerve impulses from the central nervous system to an effector like a muscle or gland?

Afferent neuron

Efferent neuron

Interneuron

Sensory neuron

None

Which condition is characterized by the formation of a blood clot inside a blood vessel, obstructing the flow of blood?

Thrombosis

Anemia

Hemophilia

Artritis

None

The human skeleton is divided into two main parts. Which of the following bones belongs to the axial skeleton?

Femur

Radius

Sternum

Scapula

None

Which of the following best describes the cause of Alzheimer's disease as mentioned in the source material?

The formation of blood clots in the brain, leading to memory loss.

Shrinkage of brain tissue and reduced secretion of the neurotransmitter acetylcholine.

A genetic disorder affecting the myelin sheath, leading to muscle weakness

A progressive disorder caused by a lack of the neurotransmitter dopamine.

None

10.

Which of the following correctly describes a symptom and cause of osteoporosis?

Symptom: Porous, brittle bones; Cause: Lack of calcium and Vitamin D.

Symptom: Progressive muscle weakening; Cause: A mutant gene on the X chromosome.

Symptom: Inability of blood to clot; Cause: Lack of clotting factors.

Symptom: Joint inflammation; Cause: Uric acid crystal buildup.

None

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